/**
 * 
 */
package cn.com.easy.utils;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.Binarizer;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.EncodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**
 * 二维码工具类
 * 
 * @author nibili 2015年1月27日下午1:16:09
 * 
 */
public class QRCodeImgUtils {

	public static void main(String[] args) throws WriterException {
		String content = "http://192.168.26.150/kangwu/1.htmlhttp://192.168.26.150/kangwu/1.htmlhttp://192.168.26.150/kangwu/1.htmlhttp://192.168.26.150/kangwu/1.html";

		try {

			QRCodeImgUtils.createImg(content, 124, 124, "D:/newPic.jpg");
			// QRCodeImgUtils.createImgWithLogo(content, 300, 300,
			// "D:/newPic1.jpg",
			// "E:/快盘1/projects/yishanjia/yishanjia-platform/src/main/webapp/assets/webapp/images/m_icon8.png");
			// 二维码解析
			Thread.sleep(1000);
			String tempString = QRCodeImgUtils.parseQR_CODEImage(new File("D:/newPic1.jpg"));
			System.out.println(tempString);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 输出 二维码到客户端
	 * 
	 * @param toEncodeString
	 * @param picWigth
	 * @param picHeight
	 * @param httpServletResponse
	 * @throws Exception
	 * @author nibili 2017年5月11日
	 */
	public static void createImg(String toEncodeString, int picWigth, int picHeight, HttpServletResponse httpServletResponse) throws Exception {
		BufferedImage bim = QRCodeImgUtils.getQR_CODEBufferedImage(toEncodeString, BarcodeFormat.QR_CODE, picWigth, picHeight, QRCodeImgUtils.getDecodeHintType());
		ImageIO.write(bim, "jpeg", httpServletResponse.getOutputStream());
	}

	/**
	 * 创建二维码图片
	 * 
	 * @param toEncodeString
	 * @param picWigth
	 * @param picHeight
	 * @param targetFilePath
	 * @throws Exception
	 * @auth nibili 2015年1月27日 下午2:41:42
	 */
	public static void createImg(String toEncodeString, int picWigth, int picHeight, String targetFilePath) throws Exception {
		BufferedImage bim = QRCodeImgUtils.getQR_CODEBufferedImage(toEncodeString, BarcodeFormat.QR_CODE, picWigth, picHeight, QRCodeImgUtils.getDecodeHintType());
		File file = new File(targetFilePath);
		if (file.exists()) {
			file = new File(targetFilePath);
		}
		ImageIO.write(bim, "jpeg", file);
	}

	/**
	 * 创建二维码图片
	 * 
	 * @param toEncodeString
	 * @param picWigth
	 * @param picHeight
	 * @param targetFilePath
	 * @throws Exception
	 * @auth nibili 2015年1月27日 下午2:41:42
	 */
	public static void createImgWithLogo(String toEncodeString, int picWigth, int picHeight, String targetFilePath, String logoPath) throws Exception {
		BufferedImage bim = QRCodeImgUtils.getQR_CODEBufferedImage(toEncodeString, BarcodeFormat.QR_CODE, picWigth, picHeight, QRCodeImgUtils.getDecodeHintType());
		File file = new File(targetFilePath);
		if (file.exists()) {
			file = new File(targetFilePath);
		}
		ImageIO.write(bim, "jpeg", file);
		addLogo_QRCode(file, new File(logoPath), new LogoConfig());
		// Thread.sleep(1000);
		// parseQR_CODEImage(file);

	}

	/**
	 * 二维码的解析
	 * 
	 * @param file
	 */
	@SuppressWarnings("unchecked")
	public static String parseQR_CODEImage(File file) {
		try {
			MultiFormatReader formatReader = new MultiFormatReader();

			// File file = new File(filePath);
			if (!file.exists()) {
				return "";
			}

			BufferedImage image = ImageIO.read(file);

			LuminanceSource source = new BufferedImageLuminanceSource(image);
			Binarizer binarizer = new HybridBinarizer(source);
			BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);

			@SuppressWarnings("rawtypes")
			Map hints = new HashMap<Object, String>();
			hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

			Result result = formatReader.decode(binaryBitmap, hints);

			return result.getText();
		} catch (Exception e) {
			e.printStackTrace();
			return "error";
		}
	}

	/**
	 * 生成二维码bufferedImage图片
	 * 
	 * @param content
	 *            编码内容
	 * @param barcodeFormat
	 *            编码类型
	 * @param width
	 *            图片宽度
	 * @param height
	 *            图片高度
	 * @param hints
	 *            设置参数
	 * @return
	 */
	private static BufferedImage getQR_CODEBufferedImage(String content, BarcodeFormat barcodeFormat, int width, int height, Map<EncodeHintType, ?> hints) {
		MultiFormatWriter multiFormatWriter = null;
		BitMatrix bm = null;
		BufferedImage image = null;
		try {
			multiFormatWriter = new MultiFormatWriter();

			// 参数顺序分别为：编码内容，编码类型，生成图片宽度，生成图片高度，设置参数
			bm = multiFormatWriter.encode(content, barcodeFormat, width, height, hints);
			//
			bm = updateBit(bm, 5);

			int w = bm.getWidth();
			int h = bm.getHeight();
			image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

			// 开始利用二维码数据创建Bitmap图片，分别设为黑（0xFFFFFFFF）白（0xFF000000）两色
			for (int x = 0; x < w; x++) {
				for (int y = 0; y < h; y++) {
					image.setRGB(x, y, bm.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
				}
			}
			// 缩放
			image = zoomInImage(image, width, height);

		} catch (WriterException e) {
			e.printStackTrace();
		}
		return image;
	}

	/**
	 * 设置二维码白边
	 * 
	 * @param matrix
	 * @param margin
	 * @return
	 * @author nibili 2017年6月11日
	 */
	private static BitMatrix updateBit(BitMatrix matrix, int margin) {

		int tempM = margin * 2;

		int[] rec = matrix.getEnclosingRectangle(); // 获取二维码图案的属性

		int resWidth = rec[2] + tempM;

		int resHeight = rec[3] + tempM;

		BitMatrix resMatrix = new BitMatrix(resWidth, resHeight); // 按照自定义边框生成新的BitMatrix

		resMatrix.clear();

		for (int i = margin; i < resWidth - margin; i++) { // 循环，将二维码图案绘制到新的bitMatrix中

			for (int j = margin; j < resHeight - margin; j++) {

				if (matrix.get(i - margin + rec[0], j - margin + rec[1])) {

					resMatrix.set(i, j);

				}

			}

		}

		return resMatrix;

	}

	/**
	 * 
	 * 图片放大缩小
	 */

	public static BufferedImage zoomInImage(BufferedImage originalImage, int width, int height) {

		BufferedImage newImage = new BufferedImage(width, height, originalImage.getType());

		Graphics g = newImage.getGraphics();

		g.drawImage(originalImage, 0, 0, width, height, null);

		g.dispose();

		return newImage;

	}

	/**
	 * 给二维码图片添加Logo
	 * 
	 * @param qrPic
	 * @param logoPic
	 */
	private static void addLogo_QRCode(File qrPic, File logoPic, LogoConfig logoConfig) {
		try {
			if (!qrPic.isFile() || !logoPic.isFile()) {
				System.out.print("file not find !");
				System.exit(0);
			}

			/**
			 * 读取二维码图片，并构建绘图对象
			 */
			BufferedImage image = ImageIO.read(qrPic);
			Graphics2D g = image.createGraphics();

			/**
			 * 读取Logo图片
			 */
			BufferedImage logo = ImageIO.read(logoPic);

			int widthLogo = logo.getWidth(), heightLogo = logo.getHeight();

			// 计算图片放置位置
			int x = (image.getWidth() - widthLogo) / 2;
			int y = (image.getHeight() - logo.getHeight()) / 2;

			// 开始绘制图片
			g.drawImage(logo, x, y, widthLogo, heightLogo, null);
			g.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15);
			g.setStroke(new BasicStroke(logoConfig.getBorder()));
			g.setColor(logoConfig.getBorderColor());
			g.drawRect(x, y, widthLogo, heightLogo);

			g.dispose();

			ImageIO.write(image, "jpeg", new File("D:/newPic.jpg"));
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 将二维码生成为文件
	 * 
	 * @param bm
	 * @param imageFormat
	 * @param file
	 */
	public void decodeQR_CODE2ImageFile(BitMatrix bm, String imageFormat, File file) {
		try {
			if (null == file || file.getName().trim().isEmpty()) {
				throw new IllegalArgumentException("文件异常，或扩展名有问题！");
			}

			BufferedImage bi = fileToBufferedImage(bm);
			ImageIO.write(bi, "jpeg", file);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 将二维码生成为输出流
	 * 
	 * @param content
	 * @param imageFormat
	 * @param os
	 */
	public void decodeQR_CODE2OutputStream(BitMatrix bm, String imageFormat, OutputStream os) {
		try {
			BufferedImage image = fileToBufferedImage(bm);
			ImageIO.write(image, imageFormat, os);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 构建初始化二维码
	 * 
	 * @param bm
	 * @return
	 */
	public BufferedImage fileToBufferedImage(BitMatrix bm) {
		BufferedImage image = null;
		try {
			int w = bm.getWidth(), h = bm.getHeight();
			image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

			for (int x = 0; x < w; x++) {
				for (int y = 0; y < h; y++) {
					image.setRGB(x, y, bm.get(x, y) ? 0xFF000000 : 0xFFCCDDEE);
				}
			}

		} catch (Exception e) {
			e.printStackTrace();
		}
		return image;
	}

	/**
	 * 设置二维码的格式参数
	 * 
	 * @return
	 */
	private static Map<EncodeHintType, Object> getDecodeHintType() {
		// 用于设置QR二维码参数
		Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
		// 设置QR二维码的纠错级别（H为最高级别）具体级别信息
		hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
		// 设置编码方式
		hints.put(EncodeHintType.CHARACTER_SET, "utf-8");

		return hints;
	}
}

class LogoConfig {

	// logo默认边框颜色
	public static final Color DEFAULT_BORDERCOLOR = Color.WHITE;
	// logo默认边框宽度
	public static final int DEFAULT_BORDER = 2;
	// logo大小默认为照片的1/5
	public static final int DEFAULT_LOGOPART = 5;

	private final int border = DEFAULT_BORDER;
	private final Color borderColor;
	private final int logoPart;

	/**
	 * Creates a default config with on color {@link #BLACK} and off color
	 * {@link #WHITE}, generating normal black-on-white barcodes.
	 */
	public LogoConfig() {
		this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);
	}

	public LogoConfig(Color borderColor, int logoPart) {
		this.borderColor = borderColor;
		this.logoPart = logoPart;
	}

	public Color getBorderColor() {
		return borderColor;
	}

	public int getBorder() {
		return border;
	}

	public int getLogoPart() {
		return logoPart;
	}

}
